The answer is probably just a lot (most?) people don't sweat as much as you do. It's a solution that works for many but not all. There's also a huge uptake for ebikes, which remove a lot of the exertion component.

As an aside, when I started cycling I sweat a lot more than I do now. It is a mild form of exercise, after all. Once you get used to it, cycling at a leisurely pace takes less energy than walking.